The diagrams given below are cross sections of blood vessels:


i. Identify the blood vessels A, B and C.
ii. Name the parts labelled 1 to 3.
iii. Name the type of blood that flows through A.
iv. Mention one structural difference between A and B.
v. In which of the above vessels does exchange of gases actually take place?

State the exact location of the following:

Pulmonary semilunar valve

Choose the correct answer from the four options given below:

Pulse wave is mainly caused by the

Differentiate between the following pairs on the basis of what is mentioned within brackets:

Bicuspid valve and Tricuspid valve (function)

The diagram given below represents the human heart in one phase of its functional activities. Study the same and answer the questions which follow:

(i) Name the phase.
(ii) Label the parts 1, 2 and 3.
(iii) Which part of the heart is contracting in this phase? Give a reason to support your answer. 
(iv)Draw a well-labeled diagram of part 1 and 2 to show the structural differences between them.

Name the following:

iii. The vein that carries oxygenated blood.

Rewrite and complete the following sentences by inserting the correct word
in the space indicated:

Give the biological/technical terms for the following:

ix. The sound produced when the atrio-ventricular valves close in the heart.

The diagrams given below are cross sections of blood vessels:


i. Identify the blood vessels A, B and C.
ii. Name the parts labelled 1 to 3.
iii. Name the type of blood that flows through A.
iv. Mention one structural difference between A and B.
v. In which of the above vessels does exchange of gases actually take place?

Differentiate between the following pairs on the basis of what is mentioned
within brackets:

ii. RBC and WBC (Shape)

The diagram below represents the human heart in one phase of its function.

Study the diagram carefully and answer the questions that follow:

i. Name the phase.

ii. Which part of the heart is contracting in this phase? Give a reason to support your answer.

iii. Name the parts labelled 1 to 4.

iv. What type of blood flows through ‘2’?

v State the function of the part numbered ‘5’.

vi Name the membrane that covers the heart.